misc

web-extension/utils.js

@@ -0,0 +1,115 @@
+function getEbookPages(callback) {
+    chrome.runtime.sendMessage({
+        type: "get"
+    }, function(response) {
+        callback(response.allPages);
+    });
+}
+
+function saveEbookPages(pages) {
+    chrome.runtime.sendMessage({
+        type: "set",
+        pages: pages
+    }, function(response) {});
+}
+
+function removeEbook() {
+    chrome.runtime.sendMessage({
+        type: "remove"
+    }, function(response) {});
+}
+
+/////
+function getCurrentUrl() {
+    var url = window.location.href;
+    if (url.indexOf('?') > 0) {
+        url = window.location.href.split('?')[0];
+    }
+    url = url.substring(0, url.lastIndexOf('/') + 1);
+    return url;
+}
+
+function getOriginUrl() {
+    var originUrl = window.location.origin;
+    if (!originUrl) {
+        originUrl = window.location.protocol + "//" + window.location.host;
+    }
+    return originUrl;
+}
+
+function getFileExtension(fileName) {
+    var tmpFileName = fileName.split('.').pop();
+    if (tmpFileName.indexOf('?') > 0) {
+        tmpFileName = tmpFileName.split('?')[0];
+    }
+    if (tmpFileName.trim() === '') {
+        return 'jpg'; //TODO
+    }
+    return tmpFileName;
+}
+
+function getHref(hrefTxt) {
+    if (!hrefTxt) {
+        return '';
+    }
+    if (hrefTxt.indexOf('#') === 0) {
+        hrefTxt = window.location.href + hrefTxt;
+    }
+    if (hrefTxt.indexOf('/') === 0) {
+        hrefTxt = window.location.protocol + '//' + window.location.hostname + hrefTxt;
+    }
+    // hrefTxt = escape(hrefTxt);
+    return hrefTxt;
+}
+
+function getImgDownloadUrl(imgSrc) {
+    var baseUrl = getOriginUrl();
+    if (imgSrc.indexOf('//') === 0) {
+        return baseUrl.split('//')[0] + imgSrc;
+    }
+    if (imgSrc.indexOf('http') !== 0) {
+        if (imgSrc.indexOf('/') === 0) {
+            return baseUrl + imgSrc;
+        }
+        return baseUrl + '/' + imgSrc;
+    }
+    return imgSrc;
+}
+
+// https://gist.github.com/jonleighton/958841
+function base64ArrayBuffer(arrayBuffer) {
+    var base64 = '';
+    var encodings = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+
+    var bytes = new Uint8Array(arrayBuffer);
+    var byteLength = bytes.byteLength;
+    var byteRemainder = byteLength % 3;
+    var mainLength = byteLength - byteRemainder;
+
+    var a, b, c, d;
+    var chunk;
+
+    for (var i = 0; i < mainLength; i = i + 3) {
+        chunk = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
+        a = (chunk & 16515072) >> 18;
+        b = (chunk & 258048) >> 12;
+        c = (chunk & 4032) >> 6;
+        d = chunk & 63;
+        base64 += encodings[a] + encodings[b] + encodings[c] + encodings[d];
+    }
+
+    if (byteRemainder === 1) {
+        chunk = bytes[mainLength];
+        a = (chunk & 252) >> 2;
+        b = (chunk & 3) << 4;
+        base64 += encodings[a] + encodings[b] + '==';
+    } else if (byteRemainder === 2) {
+        chunk = (bytes[mainLength] << 8) | bytes[mainLength + 1];
+        a = (chunk & 64512) >> 10;
+        b = (chunk & 1008) >> 4;
+        c = (chunk & 15) << 2;
+        base64 += encodings[a] + encodings[b] + encodings[c] + '=';
+    }
+
+    return base64;
+}